To obtain an estimate for the mean age of students enrolled in evening classes, a sample of 30 evening students was surveyed. The following is a list of the ages of the students in the sample. 18, 18,19,19, 20, 20,20, 20, 21, 21, 21, 21, 22, 22, 22, 23, 23, 24, 26, 27, 28, 30, 30, 32, 35, 36, 36, 41, 45Sample ta) Give the point estimate for the mean age of students enrolled in evening classes.b) The age of students enrolled in evening classes is normally distributed. Give the 95% confidence interval for μ

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